Ryan Casey shot video of the large shark just below Damariscove Island on Tuesday.

"Well, we can’t really say for sure because the video is further away and to really identify a shark, you really need to be able to see the fins, and all of the fins, and you really need to be able to see the teeth and the mouth," said Aimee Hayden-Roderiques with the Maine State Aquarium.

Casey said he watched the shark feed on the whale for about 20 minutes.

While Casey believes it was a great white shark, the exact species is unclear.

"There are definitely great whites in the Gulf of Maine. What I think is unusual is that it was that close to shore. I mean, the islands are right here out of the harbor and that’s not to say that they’re not there, but they’re not often seen and so the fact it was seen right there that close, is very interesting and entertaining to us,” said Hayden-Roderiques.

A POSSIBLE GREAT WHITE SHARK SIGHTING JUST OFF THE COAST OF MAINE AND A LOBSTERMAN CAPTURED THE AMAZING SCENE ON VIDEO. THE WHOLE SCENE, CAUGHT ON CAMERA, JUST áMILESá FROM THE MAINE COAST. W-M-T-W NEWS EIGHT'S PAUL MERRILL JOINS US LIVE NOW FROM BOOTHBAY HARBOR WITH MORE. WE DON'T OFTEN SEE SHARKS OFF THE COAST OF MAINE BUT EXPERTS SAY THEY'RE THERE. EARLIER THIS WEEK - NEWS OF A POSSIBLE SIGHTING DOWN IN WELLS AND NOW WE'RE LEARNING MORE ABOUT A SIGHTING HERE IN BOOTHBAY HARBOR. THIS TIME, A LOBSTERMAN GRABBED HIS PHONE TO DOCUMENT WHAT HE SAW. -NATS- YOU CAN SEE A MENACING BLACK FIN BREAK THE WATER SEVERAL TIMES. THIS IS CELL PHONE VIDEO THAT BOOTHBAY HARBOR LOBSTERMAN RYAN CASEY SAYS HE SHOT ON MONDAY NEAR DAMARISCOVE ISLAND - ABOUT SIX MILES OFFSHORE. HE AND OTHER LOBSTERMEN GATHERED TO WATCH WHAT APPEARS TO BE A SHARK FEEDING ON THE FLOATING BODY OF A DEAD MINKE WHALE. 19:30:23- 19:30:33 Aimee Hayden- Roderiques/Main e State Aquarium: "Well, we can't really say for sure teeth and the mouth." AIMEE HAYDEN-RODERIQUES IS A NATURAL SCIENCE EDUCATOR AND MANAGER OF THE MAINE STATE AQUARIUM. SHE SAYS A CARNIVOROUS SHARK OF THIS SIZE COULD BE A PORBEAGLE, A MAKO, OR EVEN A GREAT WHITE. 32:42-59 There are definitely great whites - entertaining to us. AIMEE SAYS whites - entertaining to us. AIMEE SAYS WHAT'S FASCINATING ABOUT THIS VIDEO IS THAT THE LOBSTERMEN GOT TO WATCH THE SHARK FEASTING ON A FREE MEAL. 19:32:23-31 They don't eateasy to get take advantage of that situation. PEOPLE VISITING THE MAINE STATE AQUARIUM TODAY WERE EXCITED TO CHECK OUT THE AMATEUR FOOTAGE. 42:19-26 Johanna Bjorking: "our son.. .make him excited." 41:27-33 Steve Reinert/Brooklyn: It seems like it would makeall of the above maybe. NO NEED TO WORRY ABOUT GOING IN THE WATER. AIMEE FROM THE AQUARIUM REMINDS US THAT SHARKS DO NOT EAT OR ACTIVELY ATTACK HUMANS. SHARKS HAVE ONLY EVER KILLED THREE PEOPLE IN NEW ENGLAND AND NONE OF THOSE INCIDENTS HAPPENED IN MAINE. LIVE IN BOOTHBAY HARBOR, PAUL